In scientific terms, a tree is a perennial plant comprising an elongated stem (trunk), supporting branches, and leaves.Trees fall in the kingdom Plantae, which consists of all multicellular eukaryotic organisms that possess a cell wall. Kingdom Plantae consists of pteridophytes, gymnosperms, and angiosperms.Trees are immensely helpful to humans and animals alike. They provide food and shelter to animals, and humans. The wood from trees can be used as fuel, and trees collectively form a forest that serves as a natural habitat for many animals. For centuries, trees have been a source of eternal beauty and sustenance for many living organisms. To date, we know many kinds of trees, each with a unique set of features that make them identifiable. All trees serve a purpose. A small tree is just as beautiful and useful as a large one.The Use Of Trees In Our Daily LifeTrees have many uses in our daily life. Each part of a tree serves a function in sustaining life. They’re used for food, fuel, household purposes, and many more things.Trees are vital to life because they produce oxygen which is required by all living beings. This is done through the process of photosynthesis. In this process, the stomata present in the leaves of the trees absorb atmospheric carbon dioxide. The chlorophyll present absorbs sunlight from the sun, and the roots absorb different kinds of minerals from the soil. Trees, or plants in general, use photosynthesis to produce food. During the process of photosynthesis, the absorbed carbon dioxide and minerals react in the presence of sunlight to give out oxygen and energy. The energy released gets utilized by the plants, and oxygen, which is a by-product of the process, gets emitted into the atmosphere. This not only helps us live by providing oxygen but also reduces the carbon dioxide content in the atmosphere.Different kinds of trees bear different kinds of fruits. These fruits serve as a source of nutrition for many people. Some examples can be, apple trees, mango trees, orange trees, and banana trees. The wood provided by trees is also very useful. It is used as a fuel source in remote areas to date. Wood is also used to manufacture paper, which is used for writing, manufacturing furniture, and houses.Forests serve as tourist spots, promoting tourism and providing livelihood to several people.Another major use of trees is to prevent soil erosion. When a lot of trees are planted in a location, the roots of the trees run deep into the soil and hold it firmly. The top layer gets firmly attached to the roots. As a result, during high winds and floods, the top layer of the soil doesn’t get eroded. In fact, during floods, trees act as a source of resistance to the strong currents of water, slowing it down. This helps to recharge groundwater.The Main Types Of TreesTrees can be classified based on their biological class, leaves, or type of bark.Let’s take a look at biological class and explore some different types of trees:Pteridophytes: In the evolutionary process of kingdom Plantae, these were the first type of plants to inhabit and evolve on land. It’s believed that gymnosperms and angiosperms have evolved from pteridophytes themselves. These types of plants don’t possess the ability to produce flowers or seeds and hence, reproduce by producing spores. Their reproductive parts are hidden so, they are also known as cryptograms. Their body is vascular in nature, consisting of well-defined xylem and phloem. They possess well-defined roots, stems, and leaves, which are also known as fonds. Currently, there are 70 species of pteridophytes that are endemic to India. Some examples of pteridophytes are whisk fern, Dicksonia, man fern, and silver fern.Gymnosperms: Gymnosperms dominated Earth in the early and middle Mesozoic eras or the Triassic and Jurassic eras. They are plants that don’t possess the ability to bear flowers or fruits. Their seeds are exposed and found on their leaves, scales, or cones. They are softwood plants, using wind as a source of pollination. They are generally found in areas where the climate is cold. Their reproductive organs are not differentiated into the ovary, style, and stigma. Gymnosperms are further classified into six different phyla, four of which are still in existence. They are Cycadophyta, Ginkgophyta, Gnetophyta, and Pinophyta. The phyla Pteridospermales and Cordaitales are extinct. The pine tree, for example, is a gymnosperm. Other examples include spruce trees, cedar trees, and pine trees.Angiosperms: Angiosperms dominated Earth in the late Mesozoic era, or the Cretaceous period. Angiosperms, unlike gymnosperms, are trees that can bear flowers. We also know them as flowering trees. They are easily identifiable by their seeds, which are encased in a fruit, which is the ovary. The fruits in turn are protected by a structure called carpels. Typically, they are seasonal plants, unisexual or bisexual in nature, depending upon animals to reproduce. This is carried out with the help of pollen grains which sit on top of their stamens, which is their male reproductive organ. These pollen grains carry genetic material which gets transferred to the anthers, the female reproductive organ. Angiosperms are divided into two subclasses, monocotyledons, or monocots and dicotyledons, or dicots. As the name suggests, monocots possess a single cotyledon, and dicots possess two. Some examples of angiosperms are birch trees, fruit trees like apple, mango, guava, and pear trees. Even walnut trees are angiosperms.If we look at classifying trees by their leaves, let’s take a look at the following types of trees:Deciduous Trees: Deciduous tree species shed their leaves seasonally. Due to their shape and leaf pattern, they possess a high rate of photosynthesis. They shed their leaves to preserve water during the cold winter months. Generally, they are broad-leaved trees, and their leaves are wide and flat. As they grow, they tend to spread out into a round structure with diverging branches and leaves. These types of trees tend to survive in places with a mild wet climate. The maple tree, elm tree, and white oak tree, for example, are deciduous trees. Some other examples include maple trees, willow trees, and cherry trees.Evergreen Trees: An evergreen tree, as the name suggests, remains green throughout the year because they do not shed their leaves, unlike deciduous trees. Many coniferous trees are evergreen trees. These types of trees are typically large trees with pointy needle-like leaves. But, it is to be noted that not all coniferous trees are evergreen in nature. They are thicker than deciduous trees and more leathery. The southern live oak tree, for example, is an evergreen tree. Other examples of evergreen trees include white fir trees, pine trees, and some species of ash trees.The Most Common Trees In The WorldThere are 12 types of trees that can be called the most common trees in the world.Maple Trees: This is the most common tree, and it’s generally found all over the world. These trees are famous for their sweet sap, which is used to manufacture maple syrup. They are hardwood trees whose wood is used to manufacture sporting equipment like a baseball bat. They can be of variable sizes. Their heights range from 10 -40 m (32-131 ft).Oak Trees: These are some of the most common tree families found in the world. Their wood is hard and resistant to various diseases. They are often used as building materials in various industries. To date, we know that there are around 300 different species of oak trees that exist throughout the world. This is a type of deciduous tree.Sycamore Trees: These trees are large and can grow up to 40 m (131 ft) in height. The wood sourced from sycamore trees is incredibly hard and dense, so we mainly used it for building materials. These trees are easily identifiable by their bark, which is flaky in nature, giving their trunk a red and brown multi-colored appearance with white and gray spots.Pine Tree: These are evergreen coniferous trees, whose leaves are green and form needle-like structures to prevent water loss. The leaves also have a waxy coating. The hard cones that hang from the branches can also easily identify them, also referred to as one cone.Fir Tree: This is a type of ornamental tree. That is, they are used for many decorative purposes. The leaves of this tree are needle-like, but the needles are soft and flat, featuring two white stripes at the bottom.Elm Trees: We commonly find these trees in forests. They can be identified by their leaves, which are broad, pointed, and oval-shaped.Willow Tree: Willow trees can be easily identified by their long drooping appearance. Their leaves can be yellow, green, or even blue in color, making them a sight to behold. The wood sourced from this tree is soft and flexible, so it is used to make things like wicker baskets that require a type of wood that can be easily manipulated. To date, we know of at least 400 different species of this tree, all of which are deciduous in nature.Magnolia Trees: These are medium-sized softwood trees whose fruits are cone-shaped seed pods that look like berries. They can be easily identified by their large and fragrant flowers.Birch Trees: The birch tree can be identified by its bark, which is papery, and often white or silver in color. Its branches are long and droopy, and its leaves are small thin, and triangular.Tulip Trees: This tree is easily identifiable by the beautiful yellow-white flowers that it bears. Interestingly, this tree is not related to the tulip plant and has been named so due to its flowers. The softwood bark of the tulip tree, while beautiful, is not very hardy. So, it is mainly used for aesthetic purposes rather than for construction. Its leaves are rectangular, comprising four to six lobes, each 15 cm (5.9 in) in length.Butternut Trees: Butternut trees are slow-growing deciduous trees. They can be easily identified by its fruits, which look like green balls. This tree grows in moist soil and has a light gray bark that grows rougher with age. This tree is stemless and instead has large, pointed leaves growing directly from its branches.Cedar Trees: These are tall trees that can reach up to 50 m (164.04 ft) in height. Their main function is as ornamental trees. They are easily identifiable because of their scaled leaves which grow in clusters, generally dark green or bluish in color.The Different Types Of Winter TreesTwo types of trees are found in regions of cold climates; deciduous and coniferous. Deciduous trees shed their leaves during winter, whereas coniferous trees retain their leaves.Throughout the year, deciduous trees rely on their roots for water. During winters, they slow their growth and shed their leaves. This helps them to preserve water by decreasing water loss through transpiration. Also, deciduous trees start accumulating water all around their cells. When a certain temperature is reached, the water freezes to form an insulating layer, thus keeping the cells warm and protecting them from the cold.Coniferous trees are evergreen in nature, so they don’t their leaves. But, they have many adaptations that allow them to survive winters. The leaves of conifers are needle-like. Because of this, the surface area of the leaves is tiny, and water loss through transpiration is kept to a minimum. The narrower leaves also help in keeping snow deposits to a minimum, which is also aided by a waxy coating. This waxy coating also helps to reduce water loss through transpiration. The outer bark of the trees is hardy and contains air spaces that have an insulating effect, thus protecting the cells from cold weather. The bark also protects against diseases, storms, and insects.Cypress trees and juniper trees are some examples of winter trees.Other Interesting Tree FactsDifferent trees are found in different types of forests. Evergreen trees are predominant in the equatorial rainforests, deciduous trees and semi-evergreen trees are predominant in tropical deciduous forests, broadleaf trees, and evergreen conifers are found in Mediterranean forest, and deciduous trees dominate the temperate broad-leaved deciduous and mixed forests.Different types of trees can be identified on the basis of their characteristics like bark, leaves, flower, seed, fruit, and height. By looking at a flower or fruit, one can immediately identify the kind of tree, because different trees will bear different flowers. A mango tree, for example, will not bear the same type of flowers or fruit like an apple tree. If a tree has pointy needle-like leaves, then it can be classified as an evergreen tree, whereas we classify a tree with wide flat leaves as a deciduous tree. If it is observed that the seed of a tree is enclosed in a fruit, then it will be an angiosperm, and a tree with a naked seed will fall under the category of a gymnosperm. If a tree appears seedless, it will be classified as a pteridophyte. The barks of different trees also have different textures by observing which they can be identified.There are so many different types of trees throughout the world. Some different types of tree names are lime trees, shagbark hickory trees, palm trees, and honey locust trees. The shagbark hickory tree is a large deciduous tree found in the US and Canada, and palm trees are found in coastal regions. Many trees only grow in specific regions and need certain temperatures and climate conditions in order to thrive.
In scientific terms, a tree is a perennial plant comprising an elongated stem (trunk), supporting branches, and leaves.
